I have been working on an implementation of the LM6171 for a headphone amplifier. The schematic is similar to that shown in Tangent's website (http://tangentsoft.net/audio/hs-opamp.html) and the LM6171 datasheet (http://cache.national.com/ds/LM/LM6171.pdf). My first prototypes yielded DC offsets...

Can anyone tell me what the approximate storage capacity (number of songs) is with Apple lossless in a 40GB 4G iPod? Thanks.

Anyone know where you can get thumb nuts like those used on the SR-71? Not thumb screws - thumb nuts. Thanks.

I already own the PPX3 which I love but I am thinking about upgrading with some cash I have to burn. I was wondering if anyone here who has owned both could provide a comparison of the PPX3 to the MPX3?

There has been discussion of this pot/switch here http://www4.head-fi.org/forums/showthread.php?t=82848 I am currently working with a Mouser representative, trying to convince them to carry an Alps RK09 Series dual pot with an audio taper and a rotary on/off switch. This would be the same pot...

I've had two innocent questions about the workings of the SR-71 deleted from this forum. One about the power supply and one about input caps. Is there some sort of SR-71 technical questions ban?

Does anyone make such a thing? About 6 inches long?

It does not appear that the SR-71 has any input caps. Anyone know for sure?

Anyone know of a source for the thumb screws like those used on the battery compartments of the SR-71 and Supermono? Thanks.

I've been doing some experimentation and find the LM6171 to be the best-sounding op-amp I have heard in a CMOY configuration (with recommended modifications per the LM6171 spec sheet), having tried numerous others. Just curious to get other listening impressions from folks in the know about the...